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/jEdit/tags/jedit-4-2-pre14/bsh/BSHMethodInvocation.java

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Java | 102 lines | 44 code | 13 blank | 45 comment | 7 complexity | 10cbbbe082afadab1b4526c31487a1ab MD5 | raw file
  1/*****************************************************************************
  2 *                                                                           *
  3 *  This file is part of the BeanShell Java Scripting distribution.          *
  4 *  Documentation and updates may be found at http://www.beanshell.org/      *
  5 *                                                                           *
  6 *  Sun Public License Notice:                                               *
  7 *                                                                           *
  8 *  The contents of this file are subject to the Sun Public License Version  *
  9 *  1.0 (the "License"); you may not use this file except in compliance with *
 10 *  the License. A copy of the License is available at http://www.sun.com    * 
 11 *                                                                           *
 12 *  The Original Code is BeanShell. The Initial Developer of the Original    *
 13 *  Code is Pat Niemeyer. Portions created by Pat Niemeyer are Copyright     *
 14 *  (C) 2000.  All Rights Reserved.                                          *
 15 *                                                                           *
 16 *  GNU Public License Notice:                                               *
 17 *                                                                           *
 18 *  Alternatively, the contents of this file may be used under the terms of  *
 19 *  the GNU Lesser General Public License (the "LGPL"), in which case the    *
 20 *  provisions of LGPL are applicable instead of those above. If you wish to *
 21 *  allow use of your version of this file only under the  terms of the LGPL *
 22 *  and not to allow others to use your version of this file under the SPL,  *
 23 *  indicate your decision by deleting the provisions above and replace      *
 24 *  them with the notice and other provisions required by the LGPL.  If you  *
 25 *  do not delete the provisions above, a recipient may use your version of  *
 26 *  this file under either the SPL or the LGPL.                              *
 27 *                                                                           *
 28 *  Patrick Niemeyer (pat@pat.net)                                           *
 29 *  Author of Learning Java, O'Reilly & Associates                           *
 30 *  http://www.pat.net/~pat/                                                 *
 31 *                                                                           *
 32 *****************************************************************************/
 33
 34
 35package bsh;
 36
 37import java.lang.reflect.InvocationTargetException;
 38
 39class BSHMethodInvocation extends SimpleNode
 40{
 41	BSHMethodInvocation (int id) { super(id); }
 42
 43	BSHAmbiguousName getNameNode() {
 44		return (BSHAmbiguousName)jjtGetChild(0);
 45	}
 46
 47	BSHArguments getArgsNode() {
 48		return (BSHArguments)jjtGetChild(1);
 49	}
 50
 51	/**
 52		Evaluate the method invocation with the specified callstack and 
 53		interpreter
 54	*/
 55	public Object eval( CallStack callstack, Interpreter interpreter )
 56		throws EvalError
 57	{
 58		NameSpace namespace = callstack.top();
 59		BSHAmbiguousName nameNode = getNameNode();
 60
 61		// Do not evaluate methods this() or super() in class instance space
 62		// (i.e. inside a constructor)
 63		if ( namespace.getParent() != null && namespace.getParent().isClass
 64			&& ( nameNode.text.equals("super") || nameNode.text.equals("this") )
 65		)
 66			return Primitive.VOID;
 67 
 68		Name name = nameNode.getName(namespace);
 69		Object[] args = getArgsNode().getArguments(callstack, interpreter);
 70
 71		try {
 72			return name.invokeMethod( interpreter, args, callstack, this);
 73		} catch ( ReflectError e ) {
 74// XXX
 75//e.printStackTrace();
 76			throw new EvalError(
 77				"Error in method invocation: " + e.getMessage(), 
 78				this, callstack );
 79		} catch ( InvocationTargetException e ) 
 80		{
 81			String msg = "Method Invocation "+name;
 82			Throwable te = e.getTargetException();
 83
 84			/*
 85				Try to squeltch the native code stack trace if the exception
 86				was caused by a reflective call back into the bsh interpreter
 87				(e.g. eval() or source()
 88			*/
 89			boolean isNative = true;
 90			if ( te instanceof EvalError ) 
 91				if ( te instanceof TargetError )
 92					isNative = ((TargetError)te).inNativeCode();
 93				else
 94					isNative = false;
 95			
 96			throw new TargetError( msg, te, this, callstack, isNative );
 97		} catch ( UtilEvalError e ) {
 98			throw e.toEvalError( this, callstack );
 99		}
100	}
101}
102